Analysis on strain transfer of a pasted FBG strain sensor

Wu, Rujun; Zheng, Bailin; Liu, Zhigang; He, Pan; Tan, Yuegang

doi:10.1016/j.ijleo.2014.04.028

Cited by 24 publications

(5 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The higher elastic modulus is probably supposed to be favorable to strain transfer. [ 38 ] This viewpoint also can explain for the ultra‐high strain signals of SPAN cathodes using PAA binder. It should be noted that most of the systematic researches on the strain transfer in built‐in FBG sensors are based on the condition that the structure is clearly divided by three layers of fiber core, adhesive layer and the substrate that indeed generates deformation.…”

Section: Resultsmentioning

confidence: 95%

Evaluating the Effect of Binder for Sulfurized Polyacrylonitrile Cathode via Optical Fiber Sensors

Miao

Xiao

et al. 2023

Adv Funct Materials

View full text Add to dashboard Cite

Sulfurized polyacrylonitrile (SPAN) is a very stable and promising sulfur‐based cathode material for high energy density lithium–sulfur (Li–S) batteries, which can circumvent the polysulfides dissolution issue. However, the stress concentration caused by volume change in SPAN cathodes is relatively significant but is rarely focused on. It is widely reckoned that the binder plays a key role in buffering the stress induced by electrode materials and hence maintains the integrity of electrodes. Nevertheless, the understanding of the actual effect of binders to SPAN cathodes from the aspect of mechanics remains to be deepened. Here, the optical fiber Bragg grating (FBG) is implanted into SPAN cathode films to in situ evaluate the electrochemo‐mechanical behaviors by using four different binders. The internal strain evolution of SPAN cathodes is affected by multiple factors of adhesion and mechanical properties of different binders. It is found that the SPAN cathode using poly(acrylic acid) (PAA) binder with outstanding mechanical properties experiences the largest strain change but the electrochemical performance is even better under high sulfur loading. Furthermore, the strain evolution is monitored under high sulfur loading condition and how the sulfur loading affects the signals of the built‐in FBG sensors is tried to figure out.

show abstract

Section: Resultsmentioning

confidence: 95%

Evaluating the Effect of Binder for Sulfurized Polyacrylonitrile Cathode via Optical Fiber Sensors

Miao

Xiao

et al. 2023

Adv Funct Materials

View full text Add to dashboard Cite

show abstract

“…FBG sensor converts strain and temperature signals into optical signals by changing the refractive index of the grating. A section of optical fiber is carved into a grating area according to the periodic distribution of refraction rate [15][16][17]. When a light beam with broad wavelength range transports into the grating, the light with a specific wavelength λB will be reflected.…”

Section: Measurement On Strain Of Gil Insulator In Hydrostatic Testsmentioning

confidence: 99%

Experimental and numerical study on formation of interface separation and interfacial dielectric strength of GIL insulator

Guo

Wang

et al. 2019

IEEE Trans. Dielect. Electr. Insul.

View full text Add to dashboard Cite

As the transmission capacity of gas insulated transmission line (GIL) increases, the synergistic improvement in dielectric and mechanical strengths of GIL insulators is urgently needed for the development of advanced power systems. Mechanical defects in power equipment are prone to induce discharges during high voltage operations, which need to be mitigated. In this paper, the strains on the GIL insulator surface are measured by fiber Bragg grating (FBG) strain sensors during hydrostatic tests. An abnormal change of strain is detected near the interface between center conductor and the spacer. The numerical results of stress distributions of GIL insulator during manufacturing and high-voltage operation are calculated by the finite element method. The results indicate that the mechanical stresses are concentrated at the interface, which lead to the development of conductor-spacer interface separation. In addition, based on the hydrostatic test and the FEM calculations, the dielectric interfacial strength, including the electric field distribution, and flashover are investigated by a combination of numerical and experimental studies. The results indicate that the air gaps generated by the separated interface distort the electric field at the tip of the gap, which is likely to cause discharges and reduce the gas-solid interfacial flashover strength of the insulator, placing concerns of insulation failure and even operating failures of GIL. This work sheds light on the importance of interfacial structure of power equipment and will guide the design and the manufacture of GIL insulator.

show abstract

“…However, the drawback of this method is that the FBG easily suffers from chirping failures due to the non-uniform strain distribution and uneven adhesive thickness of the pasted grating, thereby causing an inaccuracy value of wavelength. In addition, the strain transfer ratio from the FBG to the substrate is affected by some random factors such as the length and thickness of the adhesive area, consequently, which will affect the measurement accuracy of the FBG [8,9]. It is well known that a method of temperature compensation for FBG sensing is needed to measure other physical parameters except temperature.…”

Section: Packaging Of Fully Pasted Fbgmentioning

confidence: 99%

Packaging and Temperature Compensation of Fiber Bragg Grating for Strain Sensing: A Survey

Kuang

Guo

et al. 2018

Photonic Sens

View full text Add to dashboard Cite

During last decades, sensor elements based on the fiber Bragg grating (FBG) have been widely studied and developed due to the advantages of immunity to electromagnetic interference, compact size, high precision, and so on. The FBG itself is sensitive to axial strain and temperature variation directly and can indirectly measure these complex physical parameters, such as pressure, displacement, and vibration, by using some specially designed elastic structures to convert them into the axial strain of the FBG. Whether the FBG is fixed on the measured object to measure the strain directly or fixed on an elastic structure body to measure other physical quantities, these types of FBGs could be collectively called as strain sensing FBGs. The packaging of the FBG has important influence on FBG characteristics that directly affect the measurement accuracy, such as strain transfer, temperature characteristic, and spectral shape. This paper summarizes the packaging methods and corresponding temperature compensation methods of the currently reported strain sensing FBGs, focusing especially on fully pasted FBG, pre-stretched FBG with double-end fixed, and metallic packaging. Furthermore, the advantages and drawbacks of different packaging methods have been analyzed, which can provide a reference for future researches.

show abstract

Analysis on strain transfer of a pasted FBG strain sensor

Cited by 24 publications

References 5 publications

Evaluating the Effect of Binder for Sulfurized Polyacrylonitrile Cathode via Optical Fiber Sensors

Evaluating the Effect of Binder for Sulfurized Polyacrylonitrile Cathode via Optical Fiber Sensors

Experimental and numerical study on formation of interface separation and interfacial dielectric strength of GIL insulator

Packaging and Temperature Compensation of Fiber Bragg Grating for Strain Sensing: A Survey

Contact Info

Product

Resources

About